Open Cascade创建自己的MFC文档程序

项目初始设置
在Visual studio中创建一个单文档MFC项目(本例以MFCTest为名称):

Open Cascade创建自己的MFC文档程序_第1张图片

 


在项目属性的VC++页面设置包含目录、库目录,在链接器的输入中添加OCC库目录下的所有.lib文件名称

添加头文件
在stdafx.h中添加:

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添加代码


MFC文档分成三个结构:

Application: 项目名称.cpp     项目名称.h 
     Doc:  项目名称View.cpp 项目名称View.h
    View: 项目名称Doc.cpp   项目名称Doc.h
在Application中 "项目名称.h" 文件中的类中加入代码:
protected: 
    Handle(Graphic3d_GraphicDriver) m_GraphicDriver; 
public:
    Handle(Graphic3d_GraphicDriver) GetGraphicDriver(){return m_GraphicDriver;} 
在对应的类的实现文件 "项目名称.cpp" 的类的构造函数中添加:
try {
Handle(Aspect_DisplayConnection) aDisplayConnection;
m_GraphicDriver = new OpenGl_GraphicDriver(aDisplayConnection);
}
catch (Standard_Failure) {
AfxMessageBox(L"(Error Ocured in Initializing the Opencascade graphic variable.)");
}
 

接着处理Document Class在 "项目名称Doc.h" 中定义的类中添加:

public:
    Handle(V3d_Viewer) GetViewer(void) {return myViewer;}
protected:
    Handle(AIS_InteractiveContext) myAISContext; 
    Handle(V3d_Viewer) myViewer; 

接着去实现文档 "项目名称Doc.cpp" 中类的"项目名称Doc::项目名称Doc()"构造函数中添加:

Handle(Graphic3d_GraphicDriver) theGraphicDriver = ((CMFCTestApp*)AfxGetApp())->GetGraphicDriver();

myViewer = new V3d_Viewer(theGraphicDriver);
myViewer->SetDefaultLights();
myViewer->SetLightOn();

myAISContext = new AIS_InteractiveContext(myViewer);

myAISContext->SetDisplayMode(AIS_Shaded,true);
myAISContext->SetAutomaticHilight(Standard_False);

 

在 "项目名称View.h" 中添加:

public:
    virtual void OnInitialUpdate(); 
protected:
    Handle(V3d_View) myView; 

 

在 "项目名称View.cpp" 中重写OnInitialUpdate()函数:

void CmOCCTView::OnInitialUpdate() {
myView = GetDocument()->GetViewer()->CreateView();
myView->SetShadingModel(V3d_GOURAUD);
Handle(Graphic3d_GraphicDriver) theGraphicDriver = ((CMFCTestApp*)AfxGetApp())->GetGraphicDriver();
Aspect_Handle aWindowHandle = (Aspect_Handle)GetSafeHwnd();
Handle(WNT_Window) aWntWindow = new WNT_Window(GetSafeHwnd());
myView->SetWindow(aWntWindow);
if (!aWntWindow->IsMapped()) {
aWntWindow->Map();
}
Standard_Integer w = 100;
Standard_Integer h = 100;
aWntWindow->Size(w, h);
::PostMessage(GetSafeHwnd(), WM_SIZE, SIZE_RESTORED, w + h * 65536);
myView->FitAll();

myView->ZBufferTriedronSetup(Quantity_NOC_RED, Quantity_NOC_GREEN, Quantity_NOC_BLUE1, 0.8, 0.05, 12);
myView->TriedronDisplay(Aspect_TOTP_LEFT_LOWER, Quantity_NOC_WHITE, 0.2, V3d_ZBUFFER);
}

 

在下方的OnDraw中加入:

myView->MustBeResized(); 
myView->Update(); 


选择x64平台编译生成即可看到界面:

注意:

在添加代码时会在new关键字处报错
将当前文件下的

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

删去即可

2. 如果编译提醒缺少dll,请将opencascade的win64/vc14/bin目录以及所有第三方库的bin目录添加到系统环境变量Path,如此可以搜索到相应dll文件。或者将dll文件复制到exe文件目录下。

绘图
在mOCCTDoc.cpp和mOCCTDoc.h中写入DrawSphere代码:(需要在mOCCTDoc.cpp中include 头文件 #include “MFCTestView.h”)

//mMFCTestDoc.cpp:
void CmOCCTDoc::DrawSphere(double Radius) {
  BRepPrimAPI_MakeSphere mkSphere(Radius);
  TopoDS_Shape Sphere = mkSphere.Shape();
  Handle(AIS_Shape) myAISSphere = new AIS_Shape(Sphere);
  myAISContext->Display(myAISSphere, Standard_False);
  CMDIFrameWnd *pFrame = (CMDIFrameWnd*)AfxGetApp()->m_pMainWnd;
  CMDIChildWnd *pChild = (CMDIChildWnd *)pFrame->GetActiveFrame();
  CmOCCTView *pView = (CmOCCTView *)pChild->GetActiveView();
  pView->FitAll();
}

 

//mMFCTestDoc.h:
void CmOCCTDoc::DrawSphere(double Radius);

在mOCCTView.h中加入一个类方法:

void FitAll() { if (!myView.IsNull()) myView->FitAll(); myView->ZFitAll(); };

接着在CMFCTestView::OnDraw中调用绘球函数:

pDoc->DrawSphere(6);

编译生成即可

 

鼠标拖拽
在 MFCTestView.cpp及MFCTestView.h中添加OnMouseMove函数:

//MFCTestView.h
protected:
afx_msg void OnMouseMove(UINT nFlags, CPoint point);

.cpp文件

// MFCTestView.cpp
BEGIN_MESSAGE_MAP(CmOCCTView, CView)
...
ON_WM_MOUSEMOVE()
...
END_MESSAGE_MAP()

...


void CmOCCTView::OnMouseMove(UINT nFlags, CPoint point) 
{ 
    // TODO: Add your message handler code here and/or call default 
    CView::OnMouseMove(nFlags, point); 
    if(nFlags && MK_LBUTTON){ 
    //myView->Rotate(point.x,point.y); 
    myView->Rotation(point.x,point.y); 
    } 
} 

如此可实现鼠标左键的拖拽旋转

参考资料:

1.如何在自己的项目中使用OpenCascade7.3

2.How to Build an simple Opencascade Program using Visual C++

 

 

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